Patent classifications
C
CHEMISTRY; METALLURGY
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C11
ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
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C11B
PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
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5/00
Preserving by using additives, e.g. anti-oxidants
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C11B5/0085
Substances of natural origin of unknown constitution, f.i. plant extracts
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